Make source include/sync_slave_sql_with_master.inc work as a
  replacement to sync_slave_with_master for NDB in MTR tests.

  The usage of mysqltest command sync_slave_with_master in MTR
  tests should in time be replaced.

  The replacement source include/sync_slave_sql_with_master.inc
  did not work in exactly the same way for NDB.

  In WL#7205 some uses of sync_slave_with_master was replaced in
  some rpl tests.  These changes make the corresponding NDB test
  to fail.

  This patch make changes needed for sync_slave_sql_with_master.inc
  to work with NDB.

  Committed transactions using the NDB engine are not directly binlogged
  but first packed in epochs.  This introduce an extra delay between
  commit and binlogging that must be taken into account when one wants
  to make sure a slave have replayed the committed transactions.

  In MySQL Cluster sync_slave_with_master is patched to make sure that
  current epoch is binlogged before taking master binlog position.
  See Bug#18375920.